zed

/** To make shared library, run:

   $ gcc -shared -O3 -o libcsum_block.so -fPIC csum_block.c

Algorithm from:
 
   http://stackoverflow.com/questions/25606833/fastest-way-to-sum-integers-in-text-file/25607155#comment40046670_25607155
*/
#include <stdint.h>